我剛剛將我的第一個 Node.js CLI 工具包發布youtube-playlist-export到 npm，但是當我嘗試通過將它安裝到本地計算機來測驗我的包時，它給出了“錯誤：ENOENT：沒有這樣的檔案或目錄”警告。

重現步驟

首先，打開終端，現在直接作業的應該是主檔案夾。

接下來，全域安裝包：

$ npm install -g youtube-playlist-export

added 397 packages, and audited 398 packages in 18s

67 packages are looking for funding
  run `npm fund` for details

10 moderate severity vulnerabilities

To address all issues (including breaking changes), run:
  npm audit fix --force

Run `npm audit` for details.

最后，運行ytpl-export命令以開始運行 CLI 應用程式。它將給出“錯誤：ENOENT：沒有這樣的檔案或目錄”警告。

$ ytpl-export
(node:4632) UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, open 'C:\Users\User\package.json'
(Use `node --trace-warnings ...` to show where the warning was created)
(node:4632) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:4632) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

附加資訊

這是專案存盤庫的簡要結構：

.
├── source/
│   ├── cli.js
│   └── ...
├── tests/
└── package.json

在 中package.json，我將"bin"欄位定義為一個物件，其"ytpl-export"屬性為"./source/cli.js"。這會ytpl-export在終端中注冊命令，以便它運行我的 CLI 應用程式。

{
  "name": "youtube-playlist-export",
  "version": "1.0.2",
  "engines": {
    "node": ">=12"
  },
  "files": [
    "source"
  ],
  "bin": {
    "ytpl-export": "./source/cli.js"
  }
}

這是源代碼source/cli.js：

#!/usr/bin/env node

import c from "chalk";
import { program } from "commander";
import { readPackage } from "read-pkg";
import updateNotifier from "update-notifier";
import idActionHandler from "./commands/id.js";
import keyActionHandler from "./commands/key.js";
import configActionHandler from "./commands/config.js";

(async () => {
  const pkg = await readPackage();

  updateNotifier({ pkg }).notify();

  program.name("ytpl-export").version(pkg.version);

  program.addHelpText("before", "Exports video data from a YouTube playlist to JSON/CSV file.\n");

  program
    .command("id")
    .description("Export video metadata of a playlist by its playlist ID.")
    .argument(
      "<playlistId>",
      // prettier-ignore
      `The value of the "list" parameter in the the playlist homepage URL (https://www.youtube.com/playlist?list=${c.greenBright("[playlistId]")})`
    )
    .option("-d, --default", "Skip all questions and use the default config")
    .addHelpText(
      "after",
      `
Example:
 $ ytpl-export id PLBCF2DAC6FFB574DE 
    `
    )
    .action(idActionHandler);

  program.command("key").description("Manage your YouTube API key.").action(keyActionHandler);

  program
    .command("config")
    .description("Edit configurations of this app.")
    .option("-p, --path", "show the path of the config file")
    .option("-r, --reset", "reset all configurations to default")
    .action(configActionHandler);

  program.parse(process.argv);
})();

uj5u.com熱心網友回復：

問題原因

由于達斯的評論，這個問題是由線路引起const pkg = await readPackage();的cli.js：

#!/usr/bin/env node

import { readPackage } from "read-pkg";
/* ... */

(async () => {
  const pkg = await readPackage();  // THIS LINE
  /* ... */
})();

據read-pkg的檔案，如果我們不提供cwd選項readPackage()，默認值cwd是process.cwd()（當前作業目錄）。由于我ytpl-export在主目錄下運行，readPackage()會嘗試package.json在主目錄中讀取，該目錄不存在。

解決方案

1. Install get-installed-path，一個將模塊的安裝路徑回傳到專案的包：

$ yarn add get-installed-path

2. 編輯cli.js這樣將從安裝路徑readPackage()讀取package.json檔案：

#!/usr/bin/env node

import { getInstalledPath } from "get-installed-path";
import { readPackage } from "read-pkg";
/* ... */

(async () => {
  const installedPath = await getInstalledPath("youtube-playlist-export");
  const pkg = await readPackage({ cwd: installedPath });
  /* ... */
})();

標籤：javascript 节点.js 新产品经理 命令行界面

上一篇：將PrimeNg表模塊添加到組件會導致錯誤-超出最大呼叫堆疊大小

下一篇：云效告訴你如何進行研發排期，高效達成目標